Heavy closed cast iron support rings with integral bosshead clamps great for supporting funnels.

• Closed retort support ring with integral bosshead made from zinc-plated cast iron
• Supports standard or separatory funnels, or use with a triangle to support flat bottomed glassware
• Distance from rod attachment to center of ring measures 12 cm (4.7"), allowing for vertical alignment across different diameter rings
• Bosshead fits 8 to 1.6 cm (0.6") diameter rods